libexpat.so.1 for my bt2.0f , based on kernel 2.6.20 and slackware 11 - where to get?

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libexpat.so.1 for my bt2.0f , based on kernel 2.6.20 and slackware 11 - where to get?

Hello again.
The title describes my issue.
I need that lib, but i have searched and searched and searched, but for my os there seems to be no kind of this library.
Can i use even RPMīs for that?
I thought, no, and that is the reason, why a have to post this.
Could someone give me advice, please?
Please donīt tell me to use bt3f, i will wait for release 4f.